Just stepping back in to give something to think about. I'm not one of those dog people who need a purebred, but my mom is. One thing I can say to stick up for her, though.
Choose between a $40 adoption for a mixed adult mutt or $500 for a carefully selected genetics purebred show dog puppy.
For me and most of you, the mixed mutt looks better, but the carefully bred dog is least likely to have health problems. You also get bragging rights around "dog communities".
Now imagine a teenage girl is going out looking for a car and the first thing that comes up is a '03 Honda Civic with 125,XXX miles for $2,500. She snaps it up. She then goes and criticizes people who buy new Lamborghinis for $250,000.
The Civic is more likely to have issues, but the Lamborghini is so cool, new, and less likely to have issues.
Doesn't really matter which way you go cause it is kind of a win-win situation. In the case of the dogs, you may be some young guy who seriously doesn't care about the dog except for color and personality and doesn't think blowing money on a cool dog is worth it. They both have similar life spans and stuff. If the purebred dog DOES get sick (or dies), your wallet is going to be harder hit.
With the car, buying the Civic increases your chances of problems with it. However, repairs are going to be less costly and easier to find. With the Lamborghini, you will get loads of attention, but if something ever goes wrong mechanically or you wreck the car, dude that'll hurt.